3I2X

Crystal structure of a chimeric trypsin inhibitor having reactive site loop of ETI on the scaffold of WCI

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Chymotrypsin inhibitor 3	polymer	187	20677.3	2	UniProt (P10822) Pfam (PF00197) In PDB	Psophocarpus tetragonolobus (Goa bean)	WCI-3
2		water	water		18.0	134	Chemie (HOH)

Sequence modifications

A, B: 4 - 186 (UniProt: P10822)

PDB	External Database	Details
Gly 0	-	expression tag
Ser 1	-	expression tag
His 2	-	expression tag
Met 3	-	expression tag
Arg 66	Gln 87	engineered mutation
Leu 67	Phe 88	engineered mutation
Arg 68	Leu 89	engineered mutation
Ala 70	Leu 91	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	41354.7
All*	Total formula weight	41354.7

*Water molecules are not included.